<template>
  <div class="upload-container">
    <div>
      <!-- style="margin-bottom: 10px" -->
      <div class="input-btns" style="display: flex">
        <input ref="input" type="file" style="display: none" @change="handleChange" :multiple="multiple" />
        <div v-if="img" class="upload-img">
          <!-- v-for="(file,index) in fileInfo.length>0?fileInfo: files" -->
          <div v-for="(file, index) in files" :key="index"
            :style="{ height: imgInfo.height + 'px', width: imgInfo.width + 'px' }" class="img-item">
            <div class="operation">
              <div class="action">
                <i class="el-icon-view view" @click="previewImg(index)"></i>
                <i class="el-icon-delete remove" @click="removeFile(index)"></i>
              </div>
              <div class="mask"></div>
            </div>

            <img :src="getImgSrc(file, index) + access_token" @error="handleImageError" />
          </div>
          <div :style="{ height: imgInfo.height + 'px', width: imgInfo.width + 'px' }"
            v-show="!autoUpload || (autoUpload && files.length < maxFile)" class="img-selector" :class="getSelector()">
            <div class="selector" @click="handleClick">
              <i :style="{ 'font-size': imgInfo.iconSize + 'px' }" :class="imgInfo.icon"></i>
            </div>
            <div v-if="!autoUpload" class="s-btn" :class="{ readonly: changed }" @click="upload">
              <div>{{ loadText }}</div>
            </div>
          </div>
        </div>
        <el-button v-else @click="handleClick">{{
          $ts('选择' + (img ? '图片' : '文件'))
        }}</el-button>

        <el-button v-if="!autoUpload && !img" type="info" :disabled="changed" @click="upload(true)"
          :loading="loadingStatus">{{ $ts('上传文件') }}</el-button>
      </div>
      <slot></slot>
      <div v-if="desc">
        <el-alert :title="getText() + '文件大小不超过' + (maxSize || 50) + 'M'" type="info" show-icon>
        </el-alert>
      </div>
      <slot name="content"></slot>
      <div v-if="!img">
        <ul class="upload-list" v-show="fileList">
          <li class="list-file" v-for="(file, index) in files" :key="index">
            <a>
              <span @click="fileOnClick(index, file)">
                <i :class="format(file)"></i>
                {{ file.name }}
              </span>
            </a>
            <span @click="removeFile(index)" class="file-remove">
              <i class="el-icon-close"></i>
            </span>
          </li>
        </ul>
      </div>
      <slot name="tip"></slot>
    </div>
    <vol-image-viewer ref="viewer"></vol-image-viewer>
  </div>
</template>
<script>
//import OSS from 'ali-oss'
const OSS = {}
//import VolImageViewer from './VolImageViewer.vue'
import { defineAsyncComponent } from 'vue'
export default {
  components: {
    'vol-image-viewer': defineAsyncComponent(() => import('@/components/basic/VolImageViewer.vue')),
  },
  props: {
    desc: {
      //是否显示默认介绍
      //是否多选
      type: Boolean,
      default: false
    },
    fileInfo: {
      //用于接收上传的文件，也可以加以默认值，显示已上传的文件，用户上传后会覆盖默认值
      type: Array,
      default: () => {
        return []
      } //格式[{name:'1.jpg',path:'127.0.01/1.jpg'}]
    },
    downLoad: {
      //是否可以点击文件下载
      type: Boolean,
      default: true
    },
    multiple: {
      //是否多选
      type: Boolean,
      default: false
    },
    maxFile: {
      //最多可选文件数量，必须multiple=true，才会生效
      type: Number,
      default: 5
    },
    maxSize: {
      //文件限制大小3M
      type: Number,
      default: 50
    },

    autoUpload: {
      //选择文件后是否自动上传
      type: Boolean,
      default: true
    },
    img: {
      //图片类型  img>excel>fileTypes三种文件类型优先级
      type: Boolean,
      default: false
    },
    excel: {
      //excel文件
      type: Boolean,
      default: false
    },
    fileTypes: {
      //指定上传文件的类型
      type: Array,
      default: () => {
        return []
      }
    },
    url: {
      //上传的url
      type: String,
      default: ''
    },
    uploadBefore: {
      //返回false会中止执行
      //上传前
      type: Function,
      default: (files) => {
        return true
      }
    },
    uploadAfter: {
      //返回false会中止执行
      //上传后
      type: Function,
      default: (result, files) => {
        return true
      }
    },
    onChange: {
      //选择文件时  //返回false会中止执行
      type: Function,
      default: (files) => {
        return true
      }
    },
    // clear: {
    //   //上传完成后是否清空文件列表
    //   type: Boolean,
    //   default: true
    // },
    fileList: {
      //是否显示选择的文件列表
      type: Boolean,
      default: true
    },
    fileClick: {
      //点击文件事件
      type: Function,
      default: (index, file, files) => {
        return true
      }
    },
    removeBefore: {
      //移除文件事件
      type: Function,
      default: (index, file, files) => {
        return true
      }
    },
    append: {
      //此属性已废弃，多文件上传，默认追加文件
      type: Boolean,
      default: false
    },
    compress: {
      //开启图片压缩
      type: Boolean,
      default: true
    },
    compressMinSize: {
      //压缩的最小比例
      type: Number,
      default: 0.7
    },
    imgOption: {
      //图片上传信息
      type: Object,
      default: () => {
        return {
          //icon: "el-icon-camera",//上传图标
          //iconSize:40,//上传图标大小
          // height: 65, //图片高度
          // width: 65,//图片宽度
        }
      }
    }
  },
  data() {
    return {
      defaultImg: new URL('@/assets/imgs/error-img.png', import.meta.url).href,
      // errorImg: 'this.src="' + require('@/assets/imgs/error-img.png') + '"',
      changed: false, //手动上传成功后禁止重复上传，必须重新选择
      model: true,
      files: [],
      bigImg: '',
      imgTypes: ['gif', 'jpg', 'jpeg', 'png', 'bmp', 'webp', 'jfif'],
      loadingStatus: false,
      loadText: '上传文件',
      access_token: '',
      imgInfo: {
        icon: 'el-icon-camera-solid',
        iconSize: 35,
        height: 65, //图片高度
        width: 65 //图片宽度
      }
    }
  },
  created() {
    Object.assign(this.imgInfo, this.imgOption)
    const tk = (this.$store.getters.getUserInfo() || { accessToken: '' }).accessToken
    if (tk) {
      this.access_token = '?access_token=' + tk
    }
    //默认有图片的禁止上传操作
    if (this.fileInfo) {
      this.changed = true
    }
    this.cloneFile(this.fileInfo)
  },
  watch: {
    fileInfo: {
      handler(files) {
        this.cloneFile(files)
      },
      deep: true
    }
  },
  methods: {
    cloneFile(files) {
      this.files = files.map((x) => {
        return {
          name: x.name || this.getFileName(x.path),
          path: x.path
        }
      })
    },
    getFileName(path) {
      if (!path) {
        return '未定义文件名'
      }
      let _index = path.lastIndexOf('/')
      return path.substring(_index + 1)
    },
    previewImg(index) {
      const imgs = this.files.map((x) => {
        return this.getImgSrc(x) + this.access_token
      })
      this.$refs.viewer.show(imgs, index)
      //  this.base.previewImg(this.getImgSrc(this.files[index]));
      //  window.open(this.getImgSrc((this.files.length>0?this.files:this.fileInfo)[index]));
    },
    getSelector() {
      if (this.autoUpload) {
        return 'auto-selector'
      }
      return 'submit-selector'
    },
    getImgSrc(file, index) {
      if (file.hasOwnProperty('path')) {
        if (this.base.isUrl(file.path)) {
          return file.path
        }
        //2020.12.27增加base64图片操作
        if (file.path.indexOf('/9j/') != -1) {
          return 'data:image/jpeg;base64,' + file.path
        }
        if (file.path.substr(0, 1) == '/') {
          file.path = file.path.substr(1)
        }
        return (this.$global.oss?.url || this.http.ipAddress) + file.path
      }
      return window.URL.createObjectURL(file)
    },
    fileOnClick(index, file) {
      if (!this.fileClick(index, file, this.files)) {
        return
      }
      //点击不下载
      if (!this.downLoad) {
        return
      }
      if (!file.path) {
        this.$message.error('请先上传文件')
        return
      }
      this.base.dowloadFile(
        file.path + this.access_token,
        file.name,
        {
          Authorization: this.$store.getters.getToken()
        },
        this.http.ipAddress
      )
    },
    getText() {
      if (this.img) {
        return '只能上传图片,'
      } else if (this.excel) {
        return '只能上传excel文件,'
      }
    },
    handleClick() {
      this.$refs.input.click()
    },
    handleChange(e) {
      //this.compress开启图片压缩,后面根据需要再完善
      // this.clearFiles();
      var result = this.checkFile(e.target.files)
      if (!result) {
        return
      }

      this.changed = false
      //如果传入了FileInfo需要自行处理移除FileInfo
      if (!this.onChange(e.target.files)) {
        return
      }
      for (let index = 0; index < e.target.files.length; index++) {
        const element = e.target.files[index]
        element.input = true
      }
      if (!this.multiple) {
        this.files.splice(0)
      }
      this.files.push(...e.target.files)

      this.$refs.input.value = null
      if (this.autoUpload && result) {
        this.upload(false)
      }
    },
    removeFile(index) {
      //如果传入了FileInfo需要自行处理移除FileInfo
      //t移除文件
      let removeFile = this.files[index]
      if (!this.removeBefore(index, removeFile, this.fileInfo)) {
        return
      }
      //删除的还没上传的文件
      if (removeFile.input) {
        this.files.splice(index, 1)
      } else {
        this.fileInfo.splice(index, 1)
      }
    },
    clearFiles() {
      this.files.splice(0)
    },
    getFiles() {
      return this.files
    },
    async compressImg() {
      if (!this.compress||!this.img) return;
      for (let index = 0; index < this.files.length; index++) {
        let originalFile = this.files[index]
        if (originalFile.size > 300 * 1024) {
          try {
            const newFile = await this.base.compressImage(originalFile, { initialQuality: this.compressMinSize });
            newFile.input = originalFile.input
            this.files.splice(index, 1, newFile);
            //  console.log(newFile.size)
          } catch (error) {
            console.log('图片压缩异常', error)
          }
        }
      }
    },
    async uploadOSS() {

    },
    async upload(vail) {
      if (vail && !this.checkFile()) return false
      if (!this.url) {
        return this.$message.error('没有配置好Url')
      }
      if (!this.files || this.files.length == 0) {
        return this.$message.error('请选择文件')
      }
      //开启压缩
      await this.compressImg();

      //过滤文件符号
      await this.base.resetFileName(this.files, (file) => {
        if (file.name?.includes(' ') || file.name?.includes(',') || file.name?.includes('+')) {
          return file.name.replaceAll(' ', '').replaceAll('+', '').replaceAll(',', '')
        }
        return false;
      })

      //增加上传时自定义参数，后台使用获取Utilities.HttpContext.Current.Request.Query["字段"]
      let params = {}
      if (! await this.uploadBefore(this.files, params)) {
        return
      }
      let paramText = ''
      if (Object.keys(params).length) {
        paramText = '?1=1'
        for (const key in params) {
          let value = params[key]
          if (typeof value == 'object') {
            value = JSON.stringify(value)
          }
          paramText += `&${key}=${value}`
        }
      }

      this.loadingStatus = true
      this.loadText = '上传中..'
      if (window.oss && window.oss.ali.use) {
        await this.uploadOSS()
        this.loadingStatus = false
        this.loadText = '上传文件'
        if (!this.uploadAfter({ status: true }, this.files)) {
          this.changed = false
          return
        } else {
          this.changed = true
        }
        this.$message.success('上传成功')
        return
      }

      var forms = new FormData()
      for (let index = 0; index < this.files.length; index++) {
        let file = this.files[index]
        if (file.input) {
          forms.append('fileInput', file, file.name)
        }
      }
      // forms.append("fileInput", this.files);

      this.http
        .post(
          this.url + paramText,
          forms,
          this.autoUpload ? '正在上传文件' : '',
          //高版本axios这里必须要指定header
          {
            headers: { 'Content-Type': 'multipart/form-data' }
          }
        )
        .then(
          (x) => {
            // this.$refs.uploadFile.clearFiles();
            this.loadingStatus = false
            this.loadText = '上传文件'
            if (!this.uploadAfter(x, this.files)) {
              this.changed = false
              return
            } else {
              this.changed = true
            }

            this.changed = x.status
            if (!x.status) {
              this.$message.error(x.message)
              // this.files = null;
              return
            }
            this.$message.success(x.message)
            //单选清除以前的数据
            //  if (!this.multiple) {
            this.fileInfo.splice(0)
            // }
            let _files = this.files.map((file) => {
              return {
                name: file.name,
                path: file.path || x.data + file.name
              }
            })
            this.fileInfo.push(..._files)
            //2021.09.25修复文件上传后不能同时下载的问题
            this.files = _files
          },
          (error) => {
            this.loadText = '上传文件'
            this.loadingStatus = false
          }
        )
    },
    format(file, checkFileType) {
      const format = file.name.split('.').pop().toLocaleLowerCase() || ''
      let fileIcon = 'el-icon-document'
      if (this.fileTypes.length > 0 && checkFileType != undefined) {
        if (this.fileTypes.indexOf(format) != -1) {
          return true
        }
        return false
      }
      if (
        checkFileType &&
        !(checkFileType instanceof Array) &&
        checkFileType != 'img' &&
        checkFileType != 'excel'
      ) {
        if (checkFileType.indexOf(format) > -1) {
          return true
        } else {
          return false
        }
      }
      if (checkFileType == 'img' || this.imgTypes.indexOf(format) > -1) {
        if (checkFileType == 'img') {
          if (this.imgTypes.indexOf(format) > -1) {
            return true
          } else {
            return false
          }
        }
        fileIcon = 'el-icon-picture-outline'
      }
      if (checkFileType == 'excel' || ['numbers', 'csv', 'xls', 'xlsx'].indexOf(format) > -1) {
        if (checkFileType == 'excel') {
          if (['numbers', 'csv', 'xls', 'xlsx'].indexOf(format) > -1) {
            return true
          } else {
            return false
          }
        }
      }
      return fileIcon
    },
    beforeUpload() { },
    checkFile(inputFiles) {
      const files = this.files

      if (this.multiple && files.length + (inputFiles || []).length > (this.maxFile || 5)) {
        this.$message.error(
          '最多只能选【' + (this.maxFile || 5) + '】' + (this.img ? '张图片' : '个文件') + ''
        )
        return false
      }
      if (!inputFiles) {
        inputFiles = this.files.filter((x) => {
          return x.input
        })
      }
      let names = []
      for (let index = 0; index < inputFiles.length; index++) {
        const file = inputFiles[index]
        if (names.indexOf(file.name) != -1) {
          file.name = '(' + index + ')' + file.name
        }
        names.push(file.name)
        if (this.img && !this.format(file, 'img')) {
          this.$message.error('选择的文件【' + file.name + '】只能是图片格式')
          return false
        }
        if (this.excel && !this.format(file, 'excel')) {
          this.$message.error('选择的文件【' + file.name + '】只能是excel文件')
          return false
        }
        if (this.fileTypes && this.fileTypes.length > 0 && !this.format(file, this.fileTypes)) {
          this.$message.error(
            '选择的文件【' + file.name + '】只能是【' + this.fileTypes.join(',') + '】格式'
          )
          return false
        }
        if (file.size > (this.maxSize || 50) * 1024 * 1024) {
          this.$message.error(
            '选择的文件【' + file.name + '】不能超过:' + (this.maxSize || 50) + 'M'
          )
          return false
        }
      }
      return true
    },
    handleImageError($e) {
      $e.target.src = this.defaultImg
    }
  }
}
</script>
<style lang="less" scoped>
.upload-list {
  padding-left: 0;
  list-style: none;
  margin: 6px 0;

  .list-file {
    line-height: 20px;
    padding: 2px;
    color: #515a6e;
    border-radius: 4px;
    transition: background-color 0.2s ease-in-out;
    overflow: hidden;
    position: relative;

    font-size: 13px;

    .file-remove {
      display: none;
      right: 0;
      //  margin-left: 50px;
      color: #0e9286;
    }
  }

  .list-file:hover {
    cursor: pointer;

    .file-remove {
      display: initial;
    }

    color: #2d8cf0;
  }
}

.upload-container {
  display: inline-block;
  width: 100%;
  // padding: 10px;

  // min-height: 250px;
  border-radius: 5px;

  .alert {
    margin-top: 43px;
  }

  .button-group>* {
    float: left;
    margin-right: 10px;
  }

  .file-info>span {
    margin-right: 20px;
  }
}

.upload-img {
  display: inline-block;

  .img-item:hover .operation {
    display: block;
  }

  .img-selector {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .img-item,
  .img-selector {
    position: relative;
    cursor: pointer;
    margin: 0 10px 10px 0;
    float: left;
    //width: 65px;
    //height: 65px;
    border: 1px solid #c7c7c7;
    overflow: hidden;
    border-radius: 3px;
    box-sizing: content-box;

    img {
      margin: 0;
      padding: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .operation {
      display: none;
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;

      .action {
        opacity: 0.6;
        text-align: center;
        background: #151515de;
        font-size: 14px;
        position: absolute;
        z-index: 90;
        width: 100%;
        bottom: 3px;
        bottom: 0;
        color: #ded5d5;
        padding-right: 7px;
        padding-bottom: 3px;
        line-height: 20px;

        .el-icon-view {
          margin: 0 10px;
        }
      }

      .mask {
        opacity: 0.6;
        background: #9e9e9e;
        top: 0;
        width: 100%;
        height: 100%;
        position: absolute;
      }
    }
  }

  .img-selector {
    font-size: 50px;
    text-align: center;

    i {
      position: relative;
      // font-size: 40px;
      color: #6f6f6f;
    }
  }

  // .auto-selector {
  //   .selector {
  //     line-height: 64px;
  //   }
  // }

  .selector {
    color: #a0a0a0;
  }

  .submit-selector {
    .s-btn {
      line-height: 22px;
      font-size: 12px;
      top: -6px;
      // padding: 2px;
      position: relative;
      background: #2db7f5;
      color: white;
    }

    .selector {
      line-height: 50px;
    }

    .readonly {
      background: #8c8c8c;
    }
  }
}

.big-model {
  width: 100%;
  height: 100%;
  position: relative;

  .m-img {}

  .mask {
    position: absolute;
    opacity: 0.6;
    background: #eee;
    top: 0;
    width: 100%;
    height: 100%;
    position: absolute;
  }
}

.auto-upload {
  z-index: 9999999;
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;

  .j-content {
    text-align: center;
    font-size: 17px;
    top: 40%;
    position: absolute;
    z-index: 999;
    left: 0;
    right: 0;
    width: 240px;
    /* height: 100%; */
    margin: auto;
    background: white;
    /* bottom: 30px; */
    line-height: 50px;
    border-radius: 6px;
    border: 1px solid #d2d2d2;
  }

  .mask {
    cursor: pointer;
    opacity: 0.6;
    width: 100%;
    height: 100%;
    background: #101010;
  }
}
</style>
